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How to Choose a Down Jacket for Women

The Spyfire  made by Kuhl  was our top scorer in the style metric. Easy to dress up or down  it was a hit with all of our testers.
By Lyra Pierotti ⋅ Review Editor
Monday January 23, 2017
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Hiding under the surface of the flashiest, fanciest, latest model down jacket is a technology arguably as old as the dinosaurs. No, seriously. (Whether or not they had feathers is a question we will leave to the paleontologists.) But not even the most brilliant of modern materials scientists have managed to create match the immense insulating properties of down. It is lightweight, super warm, and if you take care of it, it will last for years. But not all feathers are created equal. There are a few things to look for when buying a down jacket, which we will discuss here. If you want to know which ones are our favorites, read our Best Down Jacket for Women Review.

Synthetic Insulation

Patagonia Nano Puff Pullover - Women's
This is a jacket insulated with human-made fibers. It is heaver for its weight than down and doesn't compress as well. However, unlike down, it retains its loft when wet. Synthetic jackets are more durable in the short-term because if you tear a hole in the outer material, the insulation doesn't leak out. But down is more durable over the long-term, and can handle more compressions and expansions. Synthetic jackets are usually less expensive.

Down Insulation

Patagonia Down Sweater - Women's
Down is the ultimate in insulation: it has the highest warmth-to-weight ratio and is highly compressible, great for the weight-conscious outdoors person. Best of all, a good down jacket will last for years. However, the jackets often need some attention if you want them to last (careful washing and drying, dry and lofted storage), and you need to be careful not to rip them, or the feathers can leak out and leave you with no insulation. Moisture is down's Achilles heel: when it absorbs water, the feathers clump together and lose their loft--and therefore their insulating capability. These jackets tend to be expensive and get more so as the quality of the down improves.

Hydrophobic Down

Insulation industries continue to try to reinvent the feather--or, admitting defeat, layer on other supposed improvements and gimmicks to draw the consumer's wandering eye. This review aims to help you see through the nonsense and find the jacket that best suits your needs.

In the space of a few fast decades, we have made advances in the fabrics encasing the down feathers, but nothing has been able to improve upon the natural insulating properties of high quality down feathers. New technologies have been exploring the possibility of developing and improving upon the water resistance of the down feathers themselves. After years of struggling to manufacture a synthetic fiber to rival natural down, materials scientists have also been looking at ways to improve upon down itself.

Several companies have started to address the wet-down problem from the inside-out by coating down feathers in a durable water repellent compound (think of the water repellent treatment on the exterior of your rain jacket). The technology is fascinating, and in our tests, we are inclined to believe in its usefulness, at least in the short term. Critics, however, wonder how durable the treatment will be over time.

The technology does seem to be catching on, but not every company is on board, which prompts us to wonder, first, if the technology is cost-effective, and second, if it added any noticeable benefit to consumers. In our experience, we continue to find little to no discernible benefit. In the end, we tend to prefer more stout external fabric that prevents the jacket from wetting out in the first place.

Down vs. Synthetic Insulation


The down in our jackets and sleeping bags primarily comes from geese or ducks and is a byproduct of the poultry industry. It is a soft and fluffy feather that sits underneath tougher protective feathers. A fluffy baby duck is so silky soft because it is covered in warm down feathers. The best quality down, however, comes from mature adults--and goose down is typically of higher quality than duck down.

The insulating power of down comes from its ability to trap and hold air still in the jacket. When you see a bird fluffing its feathers, it is adding more air to its down feathers to trap more body heat. In high quality down, there are roughly two million interlocking and overlapping fluffy filaments that do this job. More mature down has more pockets that will trap air.

Down, however, has one major Achilles heel: when it gets wet, it has no insulating properties whatsoever. Birds have perfectly engineered feathers with interlocking barbs and a waxy coating that makes them wind and waterproof. Humans need Gore-Tex (or an equivalent waterproof material). We know from oil spills that when a bird's feathers get covered in oil, they cannot interlock to be waterproof anymore. The feathers become matted, and the down underneath gets wet, becomes compressed, and loses its insulating properties. The birds can die of hypo- or hyperthermia. In the gravest of mountain situations, the story can read similarly--but all you need is a massive winter storm, or an exploded hydration bladder in your backpack to saturate even the most water-resistant jackets.


Synthetic insulation is one answer to the problem of wet down. Primaloft is one of the most common types found in garments including jackets and gloves. Synthetic insulation keeps its loft when it gets wet, so it will still keep you warm (somewhat…don't expect to feel toasty when sitting in a soggy jacket…). The tradeoff, however, is it is not as light or compressible as down and tends to wear out much faster. A high-quality down product can last well over a decade if well cared for (and can be rejuvenated with a careful washing); however, synthetics will usually expire in the 5-10 year range.

Hydrophobic Down?

Several companies have started addressing the Achilles heel of down by adding a water-repellent coating to the down itself. Most companies use a durable water repellent (DWR) technology on the exterior, which you might remember from waterproof breathable rainwear. Now, this technology is being applied to the feathers themselves. Patagonia made its down treatment with more environmentally friendly compounds that they also say increases the loft. The jury is still out on this technology.

We extracted a small sample of DownTek treated hydrophobic down from one of our test jackets. We evaluated the look and feel of the treated down and sprayed it with water to see what happened. This is before.
We extracted a small sample of DownTek treated hydrophobic down from one of our test jackets. We evaluated the look and feel of the treated down and sprayed it with water to see what happened. This is before.

Our field tests did not find any significant practical advantage that could be easily attributed to the water-repellent properties of the down, isolated from the overall quality of the jacket. That is to say, two of our three award winners did have this hydrophobic down, but they also had much better overall construction and materials. The Montbell jackets we reviewed, however, did not use hydrophobic down and the jackets dried out in similar time after getting wet.

A sample of DownTek treated hydrophobic down after being sprayed with water. Notice how the water is beading up on the down rather than soaking into the fibers.
A sample of DownTek treated hydrophobic down after being sprayed with water. Notice how the water is beading up on the down rather than soaking into the fibers.

The International Down and Feather Bureau (IDFB) states:
"Down and Feather are an incredible natural insulation used in filling material for textile products. Down and feathers in their natural state have an array of attributes including moisture wicking and natural water repellency. For many years treatments have been developed to enhance the performance of down and feather filling material. Some of these treatments include: Anti-static, Anti-microbial, Optical Brightener, Odor Reduction or Masking Agents, Warmth Retention Additives, Durable Water Repellency (DWR), Fill Power Enhancement, Fire Retardants.

IDFB is neutral toward the application of treatments for down and feathers. IDFB believes that natural down and feathers are an extraordinary material without treatments. However, government regulations, buyer requirements, and market demands may require treatments for down and feathers. Therefore IDFB has developed a series of DWR test methods to evaluation DWR products."

In one of these testing methods, referred to as the "hydrophobic shake test," the IDFB takes down and puts it in a container with water, then shakes it. The "failure" point is when the feathers begin to take on water. For natural down, this is an impressive 22 minutes of immersion-shake-time. To be able to call a product "hydrophobic down" or "water resistant down" the down must endure an additional 20-30 minutes or a minimum of 40 minutes shake time. Sounds comical, we agree. But our general take-home point: down is pretty amazing, as-is.

Our ultimate conclusion is that these coatings can help, but they aren't necessarily a miracle. At most, they expand the range of use of a down jacket, and let it retain its warmth for slightly longer, but hydrophobic down is not a replacement for synthetic insulation or a protective shell in wet conditions.

Fill Power

A common misconception with down is that a higher fill number equates to more warmth. This is not the case. Down fill power is a way of gauging the quality of a down product, as measured by the warmth-to-weight ratio. Most jackets will range from 550 to 850 or 900 fill down with Patagonia boasting 1000 fill down with its new Encapsil technology. A rating of 800 fill means that one ounce of down equals 800 cubic inches of loft (when compressed by a standardized weight). This means that a 550 fill jacket can be just as warm as an 850 fill jacket--but it will be bulkier, less compressible, and heavier.

Various samples of down with identical weight show that as fill power increases from left to right the down lofts higher  increasing the amount of dead air space available to insulate and trap your body heat.
Various samples of down with identical weight show that as fill power increases from left to right the down lofts higher, increasing the amount of dead air space available to insulate and trap your body heat.

After harvesting down is cleaned, dried, and then sorted according to quality. The down is blown across several tubes--the down that travels the farthest is the lightest, so it falls in the high-quality tube. The heavy down falls sooner and lands in the lower quality tube.

Lower quality down products may also be diluted with feathers or feather pieces, so purchasing down from a reputable source or brand is essential. Over a relatively short amount of time, these cut feather pieces will lay flat and provide little to no loft. They can also be sharper, poking through and escaping out of the garment's outer fabric.


High quality down won't get you far if it isn't stitched together with strong fabrics and a thoughtful design.

Sewn-through Design

This design is the easiest to manufacture. The name says it all: the baffles holding the down are sewn through the whole jacket. The profile of this type of baffle design looks like a series of pointed ovals, each joined at the point with a single stitch. Simple doesn't necessarily mean cheap, however. This design makes jackets lighter, more compressible, and gives them a better range of motion. However, because there is a pinch point at the end of each baffle, the down gets compressed and makes that a potential point of heat loss. This single seam can also be less windproof.

Loved the chest pocket and the fun varied baffles.
Loved the chest pocket and the fun varied baffles.

Box Baffle Design

The box baffle design is the warmest structure for a jacket, but it is more complicated and involves more fabric, so it will typically be more expensive, bulky, and a little heavier. This is the design most common in expedition weight parkas. Imagine each baffle as its own six-sided, long rectangular box. Each baffle is joined to the next by one side of that box (the shortest side). This eliminates the pinch point between baffles so that the down can retain more of its loft and wind won't sneak through the single seam.


This category can get highly complicated with words like denier, ripstop and taffeta, funny proprietary names, and lots of numbers and measurements. All of those descriptions and numbers essentially translate to four things we care about in down jackets: durability, down-proofness, weather resistance, and softness. The good news is that it is usually pretty intuitive when you feel a fabric; you can often tell whether or not it will be durable, and this can give a reasonable indication of how wind and water resistant the jacket will be.

The Rab Microlight Alpine jacket - Women's, for example, has the stiffest hand of all the models, and it is by far the most durable and weatherproof. We could rock climb in it without it getting scuffed or snagged. It is also the most wind resistant. And in all of our testing, not a single down feather escaped from this jacket.

Fabrics with a softer hand, however, proved more challenging to evaluate. In regards to down-proofness, this is likely in part due to the quality of down used, and possibly the stitching (Montbell had several small, sharp feathers escape--but their jackets are a bargain compared to many others).

With all other variables held constant, a lower denier (thread thickness) number for a fabric means it is lighter but not as abrasion resistant. However, fabric strength and tear resistance typically rely more on the manufacturing than the denier (which has more to do with weight). Enter the ripstop pattern, visible upon close inspection of your jacket. This grid pattern weaved into fabrics stops a knick from becoming a rip.


Unlike sleeping bags, jackets do not come with a warmth rating. A common misconception is that a higher fill power means the jacket will be warmer. Buying an 850 fill jacket will be very warm for the weight, but it may not be suitable for your uses. Jacket descriptions will help you find the right jacket, as many manufacturers will identify a lightweight jacket as such--or they might even suggest the jacket be used as a mid layer insulation piece, such as the Arc'teryx Cerium SL - Women's. Generally, the thicker and loftier, the warmer the jacket will be.



There is a whole lot of surface area on your head from which to lose heat. As such, hoods can be awesome. But it depends on the use of the jacket. If it's a lighter weight midlayer, maybe you don't want a hood so the jacket will slide nicely in between your shell and a lightweight fleece without a hood bunching up behind your neck. Some hoods are designed to fit over a helmet and others underneath. Again, the application should fit the use--a beefy jacket should have a hood that fits over a helmet while a midlayer or lightweight jacket should have a sleek and snug fitting hood that you barely know is there.

The hood fits comfortably over a helmet when rock climbing and the overall design of the Microlight Alpine kept us toasty.
The hood fits comfortably over a helmet when rock climbing and the overall design of the Microlight Alpine kept us toasty.


It is counter-intuitive, but in our experience, plastic zippers are more durable than metal zippers which can bend and warp. The plastic doesn't always look as slick, but we preferred it--we want our jackets to last.

Durable zippers are a must.
Durable zippers are a must.


This is likely the first feature any climber or backpacker will look for. A lightweight down jacket that is good for rock, alpine, and ice climbing will stuff down very small into its pocket and have a sewn in loop that you can clip to the back of your harness. No need for a backpack to carry your warm layer on a fast-and-light mission--and it is ready for the draw at those icy hanging belays.

Light enough to clip to the back of your harness: Climb on!
Light enough to clip to the back of your harness: Climb on!


Even the most beautiful athletic models still don't seem to make most down jackets look very sexy. They're boxy, bulky, and not entirely flattering. Some lighter weight models are starting to show some feminine lines, with stylish baffling to accentuate curves or play with the eye, like the OR Aria jacket. But overall, our reviewers often feel they more closely resemble the Michelin man in their bulky jackets. For some more flattering jackets, check out The Best Winter Jacket For Women Review which includes some casual, long parkas.


A down jacket is an investment, and one well worth making. If you spend the extra cash on a good one and take good care of it, it can last for years and withstand regular use and abuse. A down jacket is arguably the single most important item in the avid outdoors person's clothing quiver. Skimping now will not save you money in the long run.


As with many animal resource industries, there are good practices and questionable practices when it comes to sourcing down. Live plucking is a practice that can be found described in industry documents. While the claim is that the down is harvested during a natural molt cycle, conscientious down authorities in the US and Canada identify it as an unethical and economically senseless practice.

Patagonia brought the ethics of down production into the mainstream with its introduction of "Traceable Down," which is third-party certified to be non-live-plucked and non-force-fed. See Patagonia Down Sweater Hoody - Women's for more about their jackets with Traceable Down.

Another one of the jackets in this review, the Canada Goose Hybridge Lite Hoody - Women's advertises its use of Hutterite down. The Hutterites are an ethno-religious group originating in the Austrian Tyrol, but who are now mostly found in Western Canada and the upper Great Plains of the U.S. They believe in community living and pacifism and are similar to but religiously distinct from the Amish and Mennonites. Hutterite down is also purported to be sustainably and ethically produced. Downmark is a non-profit organization that provides information on the production of down in Canada to the Down Association of Canada. They report that
"to raise birds with the highest and best yields, the Hutterites maintain free-range flocks in large fields in the vast Canadian Prairies. They have found that birds raised to maturity in a good environment grow larger and have better meat. They have been raising geese and ducks for generations, and the results are the most sought after poultry products, down and feathers. While Downmark® does not formally inspect Hutterite farms, it is well known through visits by our members that live plucking does not occur. Live plucking is an unacceptable practice."

If this is important to you, look for companies, such as Patagonia, that announce where they source their down.

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